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    <title>Document</title>
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    var score = prompt('请输入您的分数')
    if (score >= 90) {
        alert('牛啤')
    } else if (score >= 80) {
        alert('厉害')
    } else if (score >= 70) {
        alert('不错')
    } else if (score >= 60) {
        alert('要努力了')
    } else {
        alert('菜狗子')
    }
</script>

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